How to Connect LG S70TY Soundbar to TV: Step-by-Step Setup

If you’re wondering how to connect LG S70TY soundbar to TV, this guide walks you through the most effective ways to do it. Whether you’re setting up your new LG S70TY soundbar for the first time or upgrading your TV audio experience, this tutorial covers HDMI ARC/eARC, optical cable, and Bluetooth wireless methods. These setups enhance your TV’s sound quality, enable surround sound features, and allow you to enjoy Dolby Atmos where supported. HDMI is ideal for high-quality and responsive audio, while Bluetooth offers a wire-free alternative. By following this guide, you’ll unlock better audio for movies, sports, and streaming—all from your LG TV and S70TY setup.

Prerequisites

• LG S70TY soundbar with its included wireless subwoofer
• LG TV with HDMI ARC or eARC port, optical out, or Bluetooth support
• High-speed HDMI cable (for HDMI ARC/eARC setup)
• Optical (TOSLINK) cable (for optical connection option)
• Access to LG TV settings menu and soundbar Function/Input selection
• LG TV remote and LG S70TY soundbar remote
• Nearby power outlets for the TV, soundbar, and subwoofer

Connecting LG S70TY Soundbar to TV, Step-by-Step Instructions

1. Place the LG S70TY soundbar in front of your TV and plug in the power cords for the soundbar, subwoofer, and LG TV.
2. Connect the HDMI cable from the soundbar’s HDMI OUT (ARC/eARC) port to the HDMI IN port on the TV labeled ARC or eARC.
3. Turn on both the TV and the soundbar. Wait for devices to boot fully before continuing with setup.
4. On the soundbar remote, press the Function or Input button repeatedly until HDMI ARC or E-ARC mode is selected.
5. On your LG TV, go to Settings > Sound > Sound Out and choose HDMI ARC or eARC. Make sure HDMI-CEC (Simplink) is enabled on the TV.
6. Connect external HDMI devices to the soundbar (if needed): If you use a Blu-ray player or game console, connect its HDMI cable to the HDMI IN port on the LG S70TY soundbar. This allows the soundbar to decode high-quality audio directly before passing video to your TV.
7. Select the correct input source on the soundbar: Use the soundbar remote or press the Function button until the correct input (HDMI ARC, Optical, or Bluetooth) is selected. Each mode has a different LED indicator based on the connection type.
8. Adjust TV audio settings for optimal playback: On the TV, go to Settings > Sound > Sound Out and choose the corresponding audio output option. For HDMI ARC, choose HDMI (ARC); for optical, select Optical Out; for Bluetooth, select your LG S70TY from paired devices.
9. Ensure wireless subwoofer is working: Plug in the wireless subwoofer near the soundbar. It should pair automatically. If not, press the pairing button on the back of the soundbar. Check for a solid green or white LED on the subwoofer to confirm pairing.
10. Test the audio and adjust levels: Play content on your TV. Sound should now come from the LG S70TY soundbar. Use the soundbar remote to adjust volume, bass, and treble. Explore sound modes like Cinema, Game, or Music for the best listening experience.

Common Troubleshooting Issues

Issue	Troubleshooting Steps
No sound from soundbar	Check all cable connections and ensure they are inserted into the correct HDMI ARC or optical ports. On the TV, confirm Sound Out is set to the correct output. Reboot both the TV and the soundbar.
HDMI ARC not recognized	Verify that HDMI-CEC (called Simplink on LG TVs) is enabled. Use a certified high-speed HDMI cable. Make sure the soundbar is set to the ARC input.
Bluetooth not pairing	Ensure the soundbar is in Bluetooth pairing mode (LEDs blinking white). On the TV, confirm Bluetooth is enabled and not connected to another device. Clear old pairings if needed and retry.
Audio out of sync (lip-sync issues)	Switch from Bluetooth to HDMI or optical if latency is noticeable. Adjust Audio Delay or Lip Sync settings in the TV’s audio menu. Check soundbar audio sync settings if available.
TV remote not controlling volume	HDMI-CEC must be enabled and the soundbar connected via HDMI ARC for volume control using the TV remote. Optical or Bluetooth connections may require using the soundbar remote.

Advanced Tips

• Use an HDMI eARC connection if available on your TV and soundbar for full Dolby Atmos support and higher bitrate audio transmission.
• Connect gaming consoles and streaming boxes directly to the soundbar’s HDMI IN ports for optimal sound decoding before passing video to the TV.
• Keep LG S70TY firmware up to date by downloading updates from LG’s official website and installing via USB if needed.
• Enable Simplink/HDMI-CEC on the LG TV to allow automatic power syncing and unified remote control functionality across devices.
• Position the subwoofer 1–2 feet away from walls and corners for deeper, clearer bass without distortion or rumble.

Conclusion

Connecting your LG S70TY soundbar to your TV enhances your home entertainment setup with powerful audio and immersive sound modes. Whether you choose HDMI ARC for high-quality audio and remote control, optical for a reliable wired option, or Bluetooth for wireless convenience, setting it up is straightforward. Follow these connection steps to enjoy the full capabilities of your LG S70TY. Make sure to explore the soundbar’s features and adjust your settings for the best sonic experience.

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